[PATCH] educate users about x86 specific kludges instead of hiding thier ignorance

Hi,

the phony bzImage target in the ppc Makefiles is not helping anything,
rather it just changes the confusion from `why doesn't make bzImage
work?' to `where is my bzImage?'

lets not hide users ignorance lets teach them instead.  the attached
patch replaces the phony bzImage target with a error explaining that
bzImage is x86 only and to use zImage instead.

please apply.

--
Ethan Benson
http://www.alaska.net/~erbenson/